1.1 Scope of application

The RMAirSeT gas-insulated switchgear, fully insulated and sealed in accordance with GB and IEC standards, requires no gas replenishment during its product lifecycle.

Compact design, 3-position load switch: closing-opening/isolation-grounding, multiple solutions to meet more stringent requirements.

Suitable for harsh environments.



1.2 Installation conditions

Ambient temperature: less than or equal to 40℃; greater than or equal to -25℃ (please consult the manufacturer for low-temperature use)

Altitude: ≤1000m (For altitudes above 1000m, please consult the manufacturer)

Humidity: less than or equal to 95% for 4 hours; less than or equal to 90% for 1 month



1.3 Main features of the product

■ Robust design

The structure of the insulated metal enclosed switchgear reduces the difficulty of maintenance operations.

Leveraging its undisputed leadership in the field of medium-voltage secondary switchgear, the company has conducted a comprehensive experience feedback assessment to enhance quality and deliver exceptional benefits:

·30 years of R&D experience

·No need to re-inflate

·Long mechanical lifespan

·Brand-new operating mechanism

Composite materials, which require no lubrication, have been widely used in the aviation and automotive industries

■ Versatile architecture

RM AirSeT gas insulated switchgear (GIS) is primarily used for medium-voltage secondary power distribution.

It can achieve 1-6 functions in a single box, and is commonly used for connection, isolation, or grounding in ring networks or radial distribution networks.

Thanks to the new vacuum circuit breaker, RM AirSeT has enabled new applications such as closed-loop power distribution solutions:

·Automatic Transfer Switching (ATS)

Closed-loop distribution network

·Automatic reclosing

RMAirSeT provides a more flexible combination scheme:

·Easy expansion: switch cabinets can be combined as desired

·Up to 6 functions can be realized in a shared box

·Modular design

■ Digital RM

RMAirSeT possesses all the functions required by the smart grid

Plug and play: capable of on-site electric upgrade

Optimized asset management: based on environmental monitoring sensor technology (temperature, humidity, flood, intrusion, etc.)

Openness: Compatible with both our company's and other brands' DTUs

Progressiveness: Provides a highly integrated intelligent ring main unit, featuring numerous functions including the distributed DTU Easergy T300

Main Technical Specifications Table of RM AirSeT's New Generation Green Smart Ring Main Unit

RM AirSet
Plug and play, easy to replace parts before/after installation: Yes
The operational continuity level defined in GB/T 3906
Other high-voltage compartments or functional units remain powered. LSC 1: Low operational continuity. LSC 2: Higher operational continuity: LSC/LSC2●
Between compartments, there are partitions: PI: lower safety; Insulated partition PM: higher safety; Metal grounding: PI/PM ●
Insulation and interruption
Switching technology: Shunt Vacuum Interrupter (SVI) technology or vacuum circuit breaker
Working principle: 3-position load switch
Extended durability level in accordance with the definitions of circuit breakers and disconnect switches in GB/T 1984 and GB/T 1985: Yes
Interrupting medium: vacuum arc-extinguishing chamber
Insulating medium: dry air (1)
Relative inflation pressure at 20℃, 12kV (MPa): 0.04
Insulation level - Withstand voltage
Rated voltage Ur (KV): 12
Rated frequency (F) fr (Hz): 50
Rated power frequency withstand voltage Ud: phase-to-phase & ground kV (1min RMS) 42/fracture 48
Rated lightning impulse withstand voltage Up: phase-to-phase & ground kV (1min RMS) 42/fracture 85
current
Rated current - busbar Ir meets 1.1r: 630A
Short-time withstand current Ik kA: 20
Duration tk/tke: 4s/3s
Rated peak withstand current lp kA: 50
Degree of protection provided by enclosure
External enclosure compliant with GB/T4208 standard
Air box: IP67
Cable compartment: IP4X
Mechanism room: IP4X
Low-voltage compartment: IP4X
The interior meets the GB/T 4208 standard, with compartments rated at IP2X
Mechanical impact protection level
Base: Unclassified
Class A AFL front and side (kA): 20
Class A AFLR front side and rear (kA): 20
Level A: Duration (s): 1s
Recycling precautions
Non-recyclable components: Maximum proportion of volume/weight (solid insulation, spraying materials, ...): <1% <5%
Other materials (steel, stainless steel, copper, aluminum, recyclable composite materials, etc.): 100% recycled
Specific handling procedures for gas operation/recycling: No harmful gases (only air)
Non-SF6 technology gas-insulated switchgear. The enclosure definition complies with GBT3906 standard: Yes - sealed pressure system GIS
Service life (years): 40

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